dCT.aov = aov(mean.Ct$dCt~mean.Ct$Genotype)

summary(dCT.aov)
##                  Df Sum Sq Mean Sq F value Pr(>F)
## mean.Ct$Genotype  3 0.3982  0.1327   0.471  0.714
## Residuals         6 1.6907  0.2818
TukeyHSD(dCT.aov)
##   Tukey multiple comparisons of means
##     95% family-wise confidence level
## 
## Fit: aov(formula = mean.Ct$dCt ~ mean.Ct$Genotype)
## 
## $`mean.Ct$Genotype`
##                diff       lwr      upr     p adj
## WTM-WTF -0.31462610 -1.815026 1.185774 0.8834168
## GRF-WTF  0.05931707 -1.618181 1.736816 0.9992688
## GRM-WTF  0.23161695 -1.445882 1.909115 0.9612476
## GRF-WTM  0.37394317 -1.303555 2.051442 0.8645443
## GRM-WTM  0.54624305 -1.131255 2.223742 0.6879471
## GRM-GRF  0.17229988 -1.665308 2.009907 0.9870332
## [1] "Relative mtDNA levels in Male G85R/WT = 0.685"
## [1] "Relative mtDNA levels in Female G85R/WT = 0.96"